GE Lucalox XO High Pressure Sodium lamps offer outstanding luminous efficacy, lumen maintenance and long-life, thus reducing energy and maintenance costs. Lucalox XO lamps are of very robust and reliable construction, designed to meet the most demanding requirements. There are fewer parts and only 5 critical welds. Simplicity and robustness deliver higher reliability. In addition, they are compatible with both magnetic and GE approved electronic ballasts. Light BulbsGBP125363